===================================================== BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0x1ce/0x280 lib/usercopy.c:33 instrument_copy_to_user include/linux/instrumented.h:121 [inline] _copy_to_user+0x1ce/0x280 lib/usercopy.c:33 copy_to_user include/linux/uaccess.h:169 [inline] bpf_prog_test_run_raw_tp+0xb6c/0xc20 net/bpf/test_run.c:831 bpf_prog_test_run+0x784/0x820 kernel/bpf/syscall.c:3369 __sys_bpf+0xadd/0x1240 kernel/bpf/syscall.c:4681 __do_sys_bpf kernel/bpf/syscall.c:4767 [inline] __se_sys_bpf kernel/bpf/syscall.c:4765 [inline] __ia32_sys_bpf+0xe1/0x130 kernel/bpf/syscall.c:4765 do_syscall_32_irqs_on arch/x86/entry/common.c:113 [inline] __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:179 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:204 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:247 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Local variable info created at: bpf_prog_test_run_raw_tp+0xf0/0xc20 net/bpf/test_run.c:786 bpf_prog_test_run+0x784/0x820 kernel/bpf/syscall.c:3369 Bytes 0-3 of 4 are uninitialized Memory access of size 4 starts at ffff88804626fc70 Data copied to user address 0000000020000484 CPU: 1 PID: 5868 Comm: syz-executor.2 Not tainted 5.18.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================